Effect of chitosan coatings on some quality indices of apricot (Prunus armeniaca L.) during cold storage

In this study, the effectiveness of chitosan coating treatment to control weight loss and maintaining fruit quality of apricot was investigated. Fruits were coated with ۰.۲۵%, ۰.۵% and ۰.۷۵% chitosan as well as distilled water (control). Following treatments, fruits were stored at ۰?C and ۸۰ ? ۲% relative humidity for ۲۵ days. The weight loss, total soluble solids (TSS), titratable acidity (TA), TSS/TA, pH, vitamin C, total phenolics and antioxidant activity (DPPHsc%) were followed at an interval of ۵ days up to ۲۵ days. Weight loss from all treated and untreated fruits increased over storage time. The weight loss of chitosan coated fruits was increased in comparison to untreated samples. There was no significant difference for total soluble solids (TSS), titratable acidity (TA), TSS/TA, pH, vitamin C in coated and uncoated fruits storage. Chitosan coatings significantly increased the content of total phenolics and antioxidant activity, as ۰.۵% chitosan showed maximum total phenolics (۸۲.۶۵ mg GAE/۱۰۰g) and antioxidant activity (۲۳.۷۷ DPPHsc%). The chitosan coatings proved to induce the antioxidant capacity and also to sustain the total phenolic content.   REFERENCES Agar, T. and Polate, A. (۱۹۹۵). Effect of different packing materials on the storage quality of some apricot varieties. Acta Hortic., ۳۸۴: ۶۲۵-۶۳۱. Aherne, S.A. and ƠBrien, N.M. (۲۰۰۲). Dietary flavonols: Chemistry, food content, and metabolism. Nutr, ۱۸: ۷۵–۸۱. Arts, C.W., Vande Putte, B. and Hollinan, P.C.H. (۲۰۰۰). Catechin contents of foods commonly consumed III the Netherlands. ۱. Fruits, vegetables, staple foods and processed foods. J. Agric. Food. Chem., ۴۸: ۱۷۴۶-۱۷۵۱. Bai, R.K., Huang, M.Y. and Jiang, Y.Y. (۱۹۸۸). Selective permeabilities of chitosan-acetica acid complex membrane and chitosan-polymer complex membrane for oxygen and carbon dioxide. Polym. Bull., ۲۰: ۸۳-۸۸. Bautista-Baños, A.N., Hernández-Lauzardo, M.G., Velázquez-del Valle, M., Hernández-López, E., Ait Barka, E., Bosquez, M. and Wilson, C.L. (۲۰۰۶). Chitosan was a potential natural compound to control pre and postharvest diseases of horticultural commodities. Crop Protect., ۲۵: ۱۰۸–۱۱۸. Benhamou, N. (۱۹۹۶). Elicitor-induced plant defence pathways. Trends Plant Sci., ۱: ۲۳۳–۲۴۰. Benhamou, N. and Thériault, G. (۱۹۹۲). Treatment with chitosan enhances resistance of tomato plants to the crown and root pathogen Fusarium oxysporum f. sp. radicislycopersici. Physiol. Mol. Plant Pathol. ۴۱: ۳۳–۵۲. Carlos, H. and Adel, K.A. (۱۹۹۹). Apricot postharvest quality maintenance guidelines, California, Dept. of Pom, pp: ۱-۵. Debeaufort, F., Quezada-Gallo, J.A. and Voilley, A. (۱۹۹۸). Edible films and coatings: tomorrow’s packagings: a review. Crit. Rev. Food Sci. ۳۸: ۲۹۹–۳۱۳. Davey, M.W., van Montagu, M., Inze, D., Sanmartin, M., Kanellis, A. and Smirnoff, N. (۲۰۰۰). Plant L-ascorbic acid: Chemistry, function, metabolism, bioavailability and effects of processing. J. Sci. Food. Agric, ۸۰: ۸۲۵–۸۶۰. Du, J., Gemma, H. and Iwahori, S. (۱۹۹۷). Effects of chitosan coating on the storage of peach, Japanese pear and kiwifruit. J. Japanese Soc. Hortic. Sci. ۶۶:۱۵-۲۲. Echeverria, E. and Valich, J. (۱۹۸۹). Enzymes of sugar and acid metabolism in stored Valencia organs. J. Am. Soc. Hort. Sci., ۱۱۴: ۴۴۵-۴۴۹. Egea, M.I., Martinez-Madrid, M.C., SanchezBel, P., Muricia, M.A. and Romojaro, F. (۲۰۰۷). The influence of electron-beam ionization on ethylene metabolism and quality parameter in apricot (Prunus armeniaca L., cv Builda). Swiss Soc. Food Sci.Technol., ۴۰: ۱۰۲۷-۱۰۳۵. El Ghaouth, A., Arul, J., Ponnampalam, R. and Boulet, M. (۱۹۹۱). Chitosan coating effect on storability and quality of strawberries. J. Food Sci., ۵۶: ۱۶۱۸–۱۶۲۰. Fernando, J. Ayala-Zavalaa, Wang, Y.S., Wang, Y.C. and González-Aguilar, A.G. (۲۰۰۴). Effect of storage temperatures on antioxidant capacity and aroma compounds in strawberry fruit. Lebensm- Wiss. U. Technol. ۳۷: ۸۷–۶۹۵. Ghorpade, V.M., Hanna, M.A. and Kadam, S.S. (۱۹۹۵). Apricot In: Handbook Fruit Sci. Technol. Salunkhe D. K., S.S. Kadam (Eds.). Marcel Dekker Inc., New York. Hermann, K. (۱۹۷۶). Flavonols and compounds in fruits and vegetables. Emaelmmgs Unschau., ۲۱: ۱۷۷-۱۸۱. Holcroft, D.M. and Kader, A.A. ۱۹۹۹. Carbon dioxide-induced changes in color and anthocyanins synthesis of stored strawberry fruits. HortScience, ۳۴: ۱۲۴۴-۱۲۴۸. Ismail, H.K., Mehmet, A., and Hacer, ç. (۲۰۰۹). Antioxidant capacity, total phenolics and some chemical properties of semi-matured apricot cultivars grown in Malatya, turkey. World Appl. Sci. J., ۶: ۵۱۹-۵۲۳. Jiang, Y.M. and Li, Y.B. (۲۰۰۱). Effects of chitosan coating on postharvest life and quality of longan fruit. Food Chem. ۷۳: ۱۳۹ ۱۴۳. Kays, S.J. (۱۹۹۱). Postharvest physiology of perishable plant products. Vas Nostrand Rein Hold Book, AVI. Publishing Co., pp: ۱۴۹-۳۱۶. Kittur, F.S., Saroja, N. and Habibunnisa Tharanathan, R.N. (۲۰۰۱). Polysaccharide-based composite coating formulations for shelf-life extension of fresh banana and mango. Eur. Food Res. Technol., ۲۱۳: ۳۰۶–۳۱۱. Liu, J., Tian, S.P., Meng, X.H. and Xu, Y. (۲۰۰۷). Effects of chitosan on control of postharvest diseases and physiological responses of tomato fruit. Postharvest Biol. Technol., ۴۴: ۳۰۰–۳۰۶. Lowings, P.H. and Cutts, D.F. (۱۹۸۲). The preservation of fresh fruits and vegetables. In: Proc. Inst. Food Sci. Technol., Annual Symposium, Nottingham, UK. Macheix, J.J., Fleuriet, A. and Billot, J. (۱۹۹۰). Fruit phenolics. Florida: CRC Press, Inc. Manning, K. (۱۹۹۶). Soft fruits. In G. B. Seymour, J. E. Taylor, and G. A. Tucker (Eds.), Biochem. Fruit ripening, pp. ۳۴۷– ۳۷۷, London: Chapman & Hall. Mazumdar, B.C. and Magumdar, K. (۲۰۰۳). Methods on physico-chemical analysis of fruits. Daya publishing house. Delhi – ۱۱۰۰۳۵. Olivas, G.I. and Barbosa-Cánovas, G.V. (۲۰۰۵). Edible coatings for fresh-cut fruits. Crit. Rev. Food Sci. Nutr., ۴۵: ۶۵۷– ۶۷۰. Radi, M., Mahrouz, M. and Jaouad, A. (۱۹۹۷). Phenolic content, browning susceptibility and cartenoids content of several apricot cultivars at maturity. Hort. Sci, ۳۲: ۱۰۸۷-۱۰۹۱. Rapisarda, P., Tomaino, A., Lo Cascio, R., Bonina, F., De Pasquale, A. and Saija, A. (۱۹۹۹). Antioxidant effectiveness as influenced by phenolic content of fresh orange juices. J. Agric. Food Chem. ۴۷: ۴۷۱۸-۴۷۲۳. Re, R., Pellegrini, N., Proteggente, A., Pannala, A., Yang, M. and Rice- Evans, C. (۱۹۹۹). Antioxidant activity applying an improved ABTS radical cation decolorization assay. Free Radical Biol. Med., ۲۶: ۱۲۳۱-۱۲۳۷. Ribeiro, C., Vicente, A.A., Teixeira, J.A. and Miranda, C. (۲۰۰۷). Optimization of edible coating composition to retard strawberry fruit senescence. Postharvest Biol. Technol., ۴۴: ۶۳-۷۰. Robards, K., Prenzler, P.D., Tucker, G., Swatsitang, P. and Glover, W. (۱۹۹۹). Phenolic compounds and their role in oxidative processes in fruits. Food Chem., ۶۶: ۴۰۱-۴۳۶. Saira, I., Rathore, H.A., Majeed, S., Awan, S. and Shah, S.Z.A. (۲۰۰۹). The studies on the physico-chemical and organoleptic characteristics of apricot (Prunus armeniaca L.) produced in Rawalakot, Azad Jammu and Kashmir during storage. Pak. J. of Nutr., ۸: ۸۵۶-۸۶۰. Singleton, V.L., Orthofer, R., and LamuelaRaventós, R.S. (۱۹۹۹). Analysis of total phenols and other oxidation substrates and antioxidants by means of FolinCiocalteau Reagent. Methods Enzymol. ۲۹۹, ۱۵۲-۱۷۸. Wang, H., Cao, G. and Prior, R.L. (۱۹۹۶). Total antioxidant capacity of fruits. J. Agric. Food. Chem., ۴۴: ۷۰۱-۷۰۵. Wang, S.Y. and Lin, H.S. (۲۰۰۰). Antioxidant activity in fruit and leaves of blackberry, raspberry, and strawberry varies with cultivar and developmental stage. J. Agric. Food. Chem, ۴۸: ۱۴۰-۱۴۶. Wills, R.H.H., Scriven, F.M. and Green, H. (۱۹۸۳). Nutrient composition of stone fruit (Prunus spp.) cultivars: apricot, cherry, nectarine, peach and plum. J. Agric. Food. Chem., ۳۴: ۱۳۸۳-۱۳۸۹.

Keywords:

Chitosan coating , Apricot , Cold storage , Phenolic content , antioxidant capacity